Abstract
Fertilization management, mainly nitrogen, is one of the factors that most directly affect corn grain yield. Nitrogen dynamics in the soil is quite complex and its main source currently used in corn production, the urea, undergo intense losses in its conventional form, mainly by volatilization and leaching. Thus, the aim of this study was to assess the effect of forms, sources, and times of nitrogen application on the second crop corn. The experiment was conducted in 2016 in the Fundação Chapadão, Chapadão do Sul, MS, Brazil. The sources conventional urea, polymer-coated urea, and foliar N (8 treatments) were used as follows: control (without N addition), conventional urea (single in V3 and split in V3 and V6), polymer-coated urea (single in V3 and split in V3 and V6), conventional urea + foliar N (conventional urea in V6 and foliar in pre-flowering), polymer-coated urea + foliar N (polymer-coated urea in V6 and foliar in pre-flowering), and foliar N (split in V6 and pre-flowering). The variables stem diameter, ear index, ear length, number of grains per row, number of rows per ear, plant height, first ear height, leaf chlorophyll index, leaf N index, leaf values of Ca, Mg, Fe, Zn, Mn, and Cu, 100-grain weight, and grain yield were assessed. Nitrogen application in the form of conventional urea, polymer-coated urea, and foliar N (single or split) for second crop corn does not result in distinct benefits for the crop. Thus, attention should be paid to the commercialization of the product, which has prices established according to nitrogen forms, but without result, for example, in grain yield, which in fact will compose the producer income. The applied nitrogen form and mode of application were positive only to increase the contents of Ca, Mg, Zn, and Mn in the leaves of second crop corn. Ca was favored by the use of conventional urea and split conventional urea, Mg and Mn were only benefited by foliar N application, and Zn was benefited by the use of conventional urea, split conventional urea, conventional urea + foliar N, and polymer-coated urea+foliar N.
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Claims 9
Claim · model-written summary
Nitrogen forms and application modes did not provide distinct benefits for second crop corn.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Nitrogen applicatione0
- Outcome
- distinct benefitse0
- Direction
- does not resulte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application in the form of conventional urea, polymer-coated urea, and foliar N (single or split) for second crop corn does not result in distinct benefits for the crop.”
Claim · model-written summary
conventional urea increased leaf Ca in second crop corn.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leavese1
- Treatment
- conventional ureae0
- Outcome
- Cae0
- Direction
- favorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca was favored by the use of conventional urea and split conventional urea, Mg and Mn were only benefited by foliar N application, and Zn was benefited by the use of conventional urea, split conventional urea, conventional urea + foliar N, and polymer-coated urea+foliar N.”
e1“contents of Ca, Mg, Zn, and Mn in the leaves of second crop corn”
t0“second crop corn”
Claim · model-written summary
split conventional urea increased leaf Ca in second crop corn.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leavese1
- Treatment
- split conventional ureae0
- Outcome
- Cae0
- Direction
- favorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca was favored by the use of conventional urea and split conventional urea, Mg and Mn were only benefited by foliar N application, and Zn was benefited by the use of conventional urea, split conventional urea, conventional urea + foliar N, and polymer-coated urea+foliar N.”
e1“contents of Ca, Mg, Zn, and Mn in the leaves of second crop corn”
t0“second crop corn”
Claim · model-written summary
foliar N application increased leaf Mg in second crop corn.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leavese1
- Treatment
- foliar N applicatione0
- Outcome
- Mge0
- Direction
- benefitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca was favored by the use of conventional urea and split conventional urea, Mg and Mn were only benefited by foliar N application, and Zn was benefited by the use of conventional urea, split conventional urea, conventional urea + foliar N, and polymer-coated urea+foliar N.”
e1“contents of Ca, Mg, Zn, and Mn in the leaves of second crop corn”
t0“second crop corn”
Claim · model-written summary
foliar N application increased leaf Mn in second crop corn.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leavese1
- Treatment
- foliar N applicatione0
- Outcome
- Mne0
- Direction
- benefitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca was favored by the use of conventional urea and split conventional urea, Mg and Mn were only benefited by foliar N application, and Zn was benefited by the use of conventional urea, split conventional urea, conventional urea + foliar N, and polymer-coated urea+foliar N.”
e1“contents of Ca, Mg, Zn, and Mn in the leaves of second crop corn”
t0“second crop corn”
Claim · model-written summary
conventional urea increased leaf Zn in second crop corn.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leavese1
- Treatment
- conventional ureae0
- Outcome
- Zne0
- Direction
- benefitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca was favored by the use of conventional urea and split conventional urea, Mg and Mn were only benefited by foliar N application, and Zn was benefited by the use of conventional urea, split conventional urea, conventional urea + foliar N, and polymer-coated urea+foliar N.”
e1“contents of Ca, Mg, Zn, and Mn in the leaves of second crop corn”
t0“second crop corn”
Claim · model-written summary
split conventional urea increased leaf Zn in second crop corn.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leavese1
- Treatment
- split conventional ureae0
- Outcome
- Zne0
- Direction
- benefitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca was favored by the use of conventional urea and split conventional urea, Mg and Mn were only benefited by foliar N application, and Zn was benefited by the use of conventional urea, split conventional urea, conventional urea + foliar N, and polymer-coated urea+foliar N.”
e1“contents of Ca, Mg, Zn, and Mn in the leaves of second crop corn”
t0“second crop corn”
Claim · model-written summary
conventional urea + foliar N increased leaf Zn in second crop corn.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leavese1
- Treatment
- conventional urea + foliar Ne0
- Outcome
- Zne0
- Direction
- benefitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca was favored by the use of conventional urea and split conventional urea, Mg and Mn were only benefited by foliar N application, and Zn was benefited by the use of conventional urea, split conventional urea, conventional urea + foliar N, and polymer-coated urea+foliar N.”
e1“contents of Ca, Mg, Zn, and Mn in the leaves of second crop corn”
t0“second crop corn”
Claim · model-written summary
polymer-coated urea+foliar N increased leaf Zn in second crop corn.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leavese1
- Treatment
- polymer-coated urea+foliar Ne0
- Outcome
- Zne0
- Direction
- benefitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca was favored by the use of conventional urea and split conventional urea, Mg and Mn were only benefited by foliar N application, and Zn was benefited by the use of conventional urea, split conventional urea, conventional urea + foliar N, and polymer-coated urea+foliar N.”
e1“contents of Ca, Mg, Zn, and Mn in the leaves of second crop corn”
t0“second crop corn”
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See all 489 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.